Update CHANGELOG.

CHANGELOG.md

@@ -9,7 +9,12 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ...
 
-## [2.1.0]
+## [2.1.1] - 2019-03-18
+
+### Changed
+- Upgrade puget to 1.1.1 for a ~3x speedup sorting complex collections.
+
+## [2.1.0] - 2019-03-01
 
 ### Fixed
 - Add support for nrepl 0.6.0 which is used by leiningen 2.9.0.
@@ -146,7 +151,8 @@ First "stable" release!
 - Add `whidbey.plugin` namespace to automatically enable rendering in Leiningen
   `repl` tasks.
 
-[Unreleased]: https://github.com/greglook/whidbey/compare/2.1.0...HEAD
+[Unreleased]: https://github.com/greglook/whidbey/compare/2.1.1...HEAD
+[2.1.1]: https://github.com/greglook/whidbey/compare/2.1.0...2.1.1
 [2.1.0]: https://github.com/greglook/whidbey/compare/2.0.0...2.1.0
 [2.0.0]: https://github.com/greglook/whidbey/compare/1.3.1...2.0.0
 [1.3.1]: https://github.com/greglook/whidbey/compare/1.3.0...1.3.1